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Abstract

Shear wall system is widely adopted in high rise buildings because of its high lateral stiffness in resisting earthquakes.
According to the concept of ductility seismic design, coupling beams in shear wall structure are required to yield prior to
the damage of wall limb. However, damage in coupling beams results in repair cost post earthquake and even in some
cases it is difficult to repair the coupling beams if the damage is severe. In order to solve this problem, a novel passive
SMA damper was proposed in this study. The coupling beams connecting wall limbs are split in the middle, and the
dampers are installed between the ends of the two cantilevers. Then the relative flexural deformation of the wall limbs is
transferred to the ends of coupling beams and then to the SMA dampers. After earthquakes the deformation of the
dampers can recover automatically because of the pseudoelasticity of austenite SMA material. In order to verify the
validity of the proposed dampers, seismic responses of a 12-story coupled shear wall with such passive SMA dampers in
coupling beams was investigated. The additional stiffness and yielding deformation of the dampers and their ratios to the
lateral stiffness and yielding displacements of the wall limbs are key design parameters and were addressed. Analytical
results indicate that the displacement responses of the shear wall structure with such dampers are reduced remarkably.
The deformation of the structure is concentrated in the dampers and the damage of coupling beams is reduced.

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Advanced PhotonicsJournal of Applied Remote SensingJournal of Astronomical Telescopes Instruments and SystemsJournal of Biomedical OpticsJournal of Electronic ImagingJournal of Medical ImagingJournal of Micro/Nanolithography, MEMS, and MOEMSJournal of NanophotonicsJournal of Photonics for EnergyNeurophotonicsOptical EngineeringSPIE Reviews